A sample of 100 clients of an exercise facility was selected. Let X = the number of days per week that a randomly selected client uses the exercise facility.
X | Frequency |
---|---|
0 | 2 |
1 | 14 |
2 | 32 |
3 | 29 |
4 | 10 |
5 | 9 |
6 | 4 |
Find the number that is 1.5 standard deviations BELOW the mean.
(Round your answer to three decimal places.)
A sample of 100 clients of an exercise facility was selected. Let X = the number...
Let X be the number of packages being mailed by a randomly selected customer at a certain shipping facility. Suppose the distribution of X is as follows. x 1 P(x) 0.2 2 0.4 3 4 0.3 0.1 (a) Consider a random sample of size n = 2 (two customers), and let X be the sample mean number of packages shipped. Obtain the probability distribution of X. 1.5 35 (b) Refer to part (a) and calculate PX $ 2.5). (c) Again...
Let X be the number of packages being mailed by a randomly selected customer at a certain shipping facility. Suppose the distribution of X is as follows. 1 0.3 2 0.4 3 0.1 4 0.2 p(x) (a) Consider a random sample of size n = 2 (two customers), and let X be the sample mean number of packages shipped. Obtain the probability distribution of X. 1 1.5 2 2.5 3 3.5 4 POCO (b) Refer to part (a) and calculate...
1. Forty randomly selected students were asked the number of pairs of sneakers they owned. Let X = the number of pairs of sneakers owned. The results are as follows. X Frequency 1 2 2 5 3 6 4 13 5 13 6 1 A. Find the sample standard deviation, s. (Round your answer to two decimal places.) answer is NOT 1.22 B. Complete the columns of the chart. (Round your answers to three decimal places.) Fill in chart for...
Let X be the number of packages being mailed by a randomly selected customer at a certain shipping facility. Suppose the distribution of X is as follows. * 1 p(x) 0.2 2 0.4 3 4 0.3 0.1 (a) Consider a random sample of size n 2 (two customers), and let X be the sample mean number of packages shipped. Obtain the probability distribution of X 1 1. 5 2 3.5 PC) 04 125 x 16 X (b) Refer to part...
66 randomly selected students were asked the number of pairs of shoes they have. Let X represent the number of pairs of shoes. The results are as follows: # of Pairs of Shoes 4 5 6 7 8 9 10 11 12 13 14 15 Frequency 5 5 3 5 5 6 7 5 7 5 6 7 Round all your answers to 4 decimal places where possible. The mean is: _________ The median is: _________ The sample standard deviation...
Forty randomly selected students were asked the number of pairs of sneakers they owned. Let X = the number of pairs of sneakers owned. The results are as follows. X Frequency 1 2 2 5 3 6 4 13 5 13 6 1 A. Find the sample mean x. (Round your answer to two decimal places.) B. Find the sample standard deviation, s. (Round your answer to two decimal places.) C. Complete the columns of the chart. (Round your answers...
Forty randomly selected students were asked the number of pairs of sneakers they owned. Let X = the number of pairs of sneakers owned. The results are as follows. X Frequency 1 2 2 4 3 7 4 13 5 13 6 1 1.) Find the sample standard deviation, s. (Round your answer to two decimal places.) 2.) What percent of the students owned at least five pairs? (Round your answer to one decimal place.) *Please show step by step*
Garbage trucks entering a particular waste-management facility are weighed prior to offloading their contents. Let X = the total processing time for a randomly selected truck at this facility (waiting, weighing, and offloading). An article suggests the plausibility of a normal distribution with mean 14 min and standard deviation 4 min for X. Assume that this is in fact the correct distribution. (Round your answers to four decimal places.) (a) What is the probability that a single truck's processing time...
(5) 2. Let X be the number of packages being mailed by a randomly selected customer at a certain shipping facility. Suppose that the distribution of X is as follows: T 1 2 3 p(x) 3 .2 .5 A a random sample of size n-3 is selected. a) find pmf of Xn and construct a histogram, b) give two smallest values of S2, (S2 is the sample variance) and find their probabilities.
(5) 2. Let X be the number of...
27. In the game of Yahtzee, five number cubes are tossed. Let X represent the number on the face that lands up on any one of the number cubes. Assuming these cubes are 6-sided and fair, the expected value of X is 3.5, with a standard deviation of Let Y represent the sum of the five numbers appearing on the faces that land up, plus a 50-point "bonus". Which of the following represent the mean and standard deviation of Y....